At Geotechnical Engineering Limited we are constantly trying to improve. We believe in finding better, more economical ways to carry out ground investigations through innovation. We have a wide range of plant to carry out drilling operations in a variety of locations and we really can go where others can't or won't!
Traditionally, boreholes on slopes involved a delicate balance between cost and achievable depth, the two options being either hand held, windowless sampling or lifting at least one rig on to a scaffold platform. We knew that the hand held gave little or no valuable information and that the scaffold option was time-consuming, expensive, labour intensive and carried risks. In the firm belief that "there's always a better way", resources powered us to design and develop a "slope climbing rig", thus the P45 was born.
The P45 is modelled on a standard tracked, windowless sampling rig and is capable of sampling soils to around 12m (depending on ground conditions).
In soft soil ground conditions the P45 can achieve up to 12m depth and is capable of casing down to 6m. Dynamic samples up to 113mm diameter are retrieved in semi-rigid plastic liners providing a continuous soil profile for ground modelling and sampling. Discrete strata can be identified for contamination sampling purposes.
In-situ testing in the form of calibrated SPTs in general accordance with BS EN ISO 22476-3 and DPSH and DPH can be carried out. Undisturbed U70 samples can be taken in cohesive soils.
Borehole instrumentation can be installed including installation of 19mm and 50mm standpipes and pneumatic, hydraulic or vibrating wire Piezometers for groundwater or gas monitoring and inclinometer tubing to monitor slope movement.
The P45 is ideal for works on both Railway and Highway cuttings, embankments and for earth-filled dams. The rig is usually operated by a crew of two, and is commissioned on a daily basis enabling us to safely undertake boreholes on previously inaccessible slopes to deliver quality slope data to our Clients.